Example Problems on Static Equilibrium

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MET 301 1 of 5 Example Problems on Static Equilibrium Example 1. Suppose one truck is parked on a bridge as shown in Figure 1. The truck weighs 1000 lb which is acting through its center of gravity (CG). The bridge weighs 200 lbs per feet, which is uniformly distributed. We can assume the bridge is rigid. We want to know what will be the reaction forces at the supports of bridge at the two ends. Step 1: Draw Free Body Diagram (FBD) Total weight of the bridge = 200 lb/ft *75ft = 15,000 lb. Since the weight is uniformly distributed; it is acting through the middle of the length of the bridge, ie.

Example Problem Statically Indeterminate Type Example 4. Three vertical rods of equal length are affixed at the ceiling at one end, one 5000# weight at the other end as shown. The two outer rods have cross-sectional area 0.2 in2 and are made up of steel. The center rod is made up of bronze and has a cross-sectional area 0.3 in2.

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